Hydronium ions in soda-lime silicate glass surfaces

Laura C. Bradley, Zachary R. Dilworth, Anna L. Barnette, Erik Hsiao, Anthony J. Barthel, Carlo G. Pantano, Seong Kim

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

The presence of leachable alkali ions, or their hydrated sites in the glass, is believed to be a determining factor for the interfacial water structure at the glass surface, influencing the surface properties of glass. The interfacial water structure on soda-lime silicate glass in humid ambience at room temperature was analyzed with sum-frequency-generation (SFG) vibration spectroscopy, which can probe the interfacial water layer without spectral interferences from the gas phase water. The soda-lime glass surface exposed to water vapor shows three sharp SFG peaks at 3200, 3430, and 3670 cm-1 in SFG, which is drastically different from the SFG spectra of the water layers on the fused quartz glass surface and the liquid water/air interface. The sharp peak at 3200 cm-1 is believed to be associated with the hydronium ions in the Na+-leached silicate glass surface. The 3200 cm -1 peak intensity varies with the relative humidity, indicating its equilibrium with the gas phase water. It is proposed that the hydronium ions in the Na+-leached sites produce compressive stress in the silicate glass surface; thus the growth of hydronium ions with increasing humidity might be responsible for the increased wear resistance of soda-lime glass surfaces in near-saturation humidity conditions.

Original languageEnglish (US)
Pages (from-to)458-463
Number of pages6
JournalJournal of the American Ceramic Society
Volume96
Issue number2
DOIs
StatePublished - Feb 1 2013

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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